Caffeine (C8H10N4O2) is a weak base that is related to ammonia. For the purposes of this question, we will abbreviate the formula of caffeine to cafN (producing cafNH+ in solution). If cafN has a Kb value of 4.1 x 10-4, what is the pH of a 0.70 M solution of CafN?

An example of technology is the a. addition of a side group to an organic molecule during synthesis. b. use of a new antibiotic to fight an infection. c. measurement of iron concentration in a water sample. d. study of atomic fusion reactions

The table lists pressure and volume values for a particular gas. which is the best estimate for the value of v at p = 7.0 × 103 pascals?

Pastoral farming is best described as a. a method of raising livestock and moving herds b. an african method of agriculture c. a method of cultivating crops on poor soils d. a common method of desert farming select the best answer from the choices provided a b c d